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About the Lecture
The lecture Diffusion Capacity – Laboratory Diagnostics by Carlo Raj, MD is from the course Pulmonary Diagnostics.
Included Quiz Questions
Carbon monoxide is used in diffusion capacity tests because...?
- It diffuses across the alveolar membrane faster than O2.
- It binds to hemoglobin with a lower affinity than O2.
- It can be tagged using radioactive markers.
- It is a significantly smaller molecule.
- It has a higher partial pressure in room air.
Decreased DLCO will be accompanied by...?
- Widened A-a gradient.
- Increase in alveolar surface area.
- Decreased alveolar blood flow.
- Decreased thickness of the alveolar membrane.
- Increased diffusion of non-oxygen substances.
A patient with pulmonary fibrosis will have a decreased DLCO because...?
- There is a greater barrier to diffusion at the level of the alveoli.
- There is a greater barrier to diffusion at the level of the bronchi.
- There is an increase in surface area.
- There is a decrease in oxygen saturation.
- There is an increase in residual volume.
Author of lecture Diffusion Capacity – Laboratory Diagnostics
Carlo Raj, MD
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